21601630404616 has 32 divisors (see below), whose sum is σ = 42885813204000. Its totient is φ = 10165420170496.

The previous prime is 21601630404611. The next prime is 21601630404647. The reversal of 21601630404616 is 61640403610612.

It is a happy number.

It is a super-2 number, since 2×21601630404616² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21601630404611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40888275 + ... + 41413213.

It is an arithmetic number, because the mean of its divisors is an integer number (1340181662625).

Almost surely, 2^{21601630404616} is an apocalyptic number.

It is an amenable number.

21601630404616 is a deficient number, since it is larger than the sum of its proper divisors (21284182799384).

21601630404616 is a wasteful number, since it uses less digits than its factorization.

21601630404616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827541 (or 827537 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 21601630404616 in words is "twenty-one trillion, six hundred one billion, six hundred thirty million, four hundred four thousand, six hundred sixteen".